Name unique

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Name unique
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I want to check whether the value which I give for the name textfield already exists in the database. In case if it exists , it should not go to database when I press submit...otherwise it goes to the database. In other words, value for the name should be unique.

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Name unique
. In other words, value for the name should be unique...Name unique I want to check whether the value which I give for the name textfield already exists in the database. In case if it exists , it should

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